Biomarkers · Vitamins & Endocrine

Testosterone-to-SHBG Ratio

Higher values go with lower risk of death. No risk curve catalogued yet.

Published risk of death0.34×higher vs lower free androgen index (FAI) in men (95% CI 0.25–0.92) · NHANES 2013-2016 US adults; estimate is for the 3,473 male participants (not significant in 3,821 females)

Testosterone-to-SHBG Ratio by age and sex

Each bar runs from the 5th to the 95th percentile, the darker part from the 25th to the 75th, and the tick is the median. Not a reference range or a target.

The percentiles as a table

Each row is one sex and age band: the values below which 5%, 25%, 50%, 75% and 95% of people fall (ratio), from the survey named in the row. Not a reference range or a target.
Sex	Age	5th	25th	Median	75th	95th	n	Cycle / source
Men	20-39	0.24	0.37	0.47	0.60	0.82	806	NHANES 2015-2016
Men	40-59	0.18	0.26	0.32	0.43	0.64	766	NHANES 2015-2016
Men	60+	0.11	0.19	0.24	0.31	0.42	807	NHANES 2015-2016
Men	all	0.16	0.25	0.34	0.48	0.74	2,379	NHANES 2015-2016

Sources

Sun et al. Sex difference of the associations of sex hormone and their related indicators with all-cause mortality. Nutrition & metabolism. 2026;23:12.